package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.weaver.ast.Or;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;
import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

/**
 * @author 徐扬文
 * @version 1.0
 */
@Slf4j
@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    @Override
    public OrderSubmitVO submit(OrdersSubmitDTO ordersSubmitDTO) {
        log.info("用户下单：{}", ordersSubmitDTO);
        //1.处理各种业务异常，如：地址簿为空、购物车数据为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            //抛出地址簿为空的异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //查询用户的购物车数据
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            //抛出购物车数据为空的异常
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //2.向订单表插入1条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(BaseContext.getCurrentId());
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setAddress(addressBook.getDetail());
        orderMapper.insert(orders);

        List<OrderDetail> orderDetailList = new ArrayList<>();
        //3.向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());//设置与当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }

        orderDetailMapper.insertBatch(orderDetailList);
        //4.清空购物车数据
        shoppingCartMapper.deleteByUserId(BaseContext.getCurrentId());
        //5.封装VO,返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }

    /**
     * 历史订单查询
     */
    @Transactional
    @Override
    public PageResult historyOrders(int pageNum, int pageSize, Integer status) {
        //设置分页
        PageHelper.startPage(pageNum, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> orderVOList = new ArrayList<>();
        //获取Order_detail数据
        if(page != null && page.size() > 0){
            for (Orders orders : page) {
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                orderVOList.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), orderVOList);

    }

    /**
     * 查询订单详情
     */
    @Transactional
    @Override
    public OrderVO orderDetail(Long orderId) {
        OrderVO orderVO = new OrderVO();
        Orders orders = orderMapper.getByOrderId(orderId);
        if(orders != null){
            List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);
            BeanUtils.copyProperties(orders, orderVO);
            orderVO.setOrderDetailList(orderDetailList);
        }
        return orderVO;
    }

    /**
     * 取消订单
     */
    @Transactional
    @Override
    public void cancel(Long id) {
        log.info("取消订单");
        Orders orderBOI = orderMapper.getByOrderId(id);
        //检测订单是否存在
        if(orderBOI == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //检测订单状态 1 待付款 2 待接单 3 已接单 4 派送中 5 已完成 6 已取消
        if(orderBOI.getStatus() > 2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(orderBOI.getId());

        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     */
    @Transactional
    @Override
    public void repetition(Long id) {
        //获取当前用户id
        Long userId = BaseContext.getCurrentId();
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(orderDetail -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            BeanUtils.copyProperties(orderDetail, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态：需要额外返回订单菜品信息，将Orders数据封装成OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        //需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if(!CollectionUtils.isEmpty(ordersList)){
            for(Orders orders : ordersList){
                //将共同字段复制给OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                //获取订单菜品信息，将订单菜品信息封装给OrderVO，添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 获取订单菜品信息
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(orderDetail -> {
            String orderDish = orderDetail.getName() + "*" + orderDetail.getNumber() + "；";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     */
    @Override
    public OrderStatisticsVO statistics() {
        //根据状态，查询待接单，待派送，派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer DeliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(DeliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 根据id查询订单
     */
    @Transactional
    @Override
    public OrderVO getById(Long id) {
        log.info("根据id查询订单：{}", id);
        OrderVO orderVO = new OrderVO();
        Orders orders = orderMapper.getByOrderId(id);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 接单
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        log.info("接单");
        Orders orders = new Orders();
        orders.setId(ordersConfirmDTO.getId());
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);
    }

    /**
     * 拒单
     */
    @Override
    public void rejectOrder(OrdersRejectionDTO ordersRejectionDTO) {
        log.info("拒单");
        Orders ordersDB = orderMapper.getByOrderId(ordersRejectionDTO.getId());
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Orders orders = new Orders();
        orders.setId(ordersRejectionDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 商家取消订单
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     */
    @Override
    public void delivery(Long id) {
        // 查询订单
        Orders ordersDB = orderMapper.getByOrderId(id);
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     */
    @Override
    public void complete(Long id) {
        Orders ordersDB = orderMapper.getByOrderId(id);
        if(ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.COMPLETED);
        orderMapper.update(orders);
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        /*JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }*/

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        //为代替微信支付成功后的数据库订单状态，多定义一个方法进行修改
        Integer OrderPaidStatus = Orders.PAID;
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;

        //给check_out赋值
        LocalDateTime checkoutTime = LocalDateTime.now();

        //获取订单号码
        String orderNumber = ordersPaymentDTO.getOrderNumber();

        log.info("微信支付成功：{}", vo);
        Orders orders = new Orders();
        orders.setId(userId);
        orders.setNumber(orderNumber);
        orders.setStatus(OrderStatus);
        orders.setCheckoutTime(checkoutTime);
        orders.setPayStatus(OrderPaidStatus);
        orderMapper.update(orders);

        /*OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));*/


        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        Map map = new HashMap();
        map.put("type", 1);// 消息类型，1表示来单提醒
        //获取订单id
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号：" + outTradeNo);

        // 通过WebSocket实现来单提醒，向客户端浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
        log.info("来单提醒：{}", JSON.toJSONString(map));
    }

    /**
     * 用户催单
     */
    @Override
    public void reminder(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getByOrderId(id);

        //校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Map map = new HashMap();
        map.put("type", 2);
        map.put("orderId", id);
        map.put("content", "订单号：" + ordersDB.getNumber());
        log.info("来单提醒：{}", JSON.toJSONString(map));
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
